A time-series plot often helps you determine the appropriate model to use. For this problem, use each

Question:

A time-series plot often helps you determine the appropriate model to use. For this problem, use each of the time series presented in the following table and stored in Time Series B.

a. Plot the observed data Y over time X and plot the logarithm of the observed data (log Y) over time X to determine whether a linear trend model or an exponential trend model is more appropriate.
b. Compute the appropriate forecasting equation.
c. Forecast the value for 2019.

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